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Codebook for NHGIS data file 'nhgis0018_ds107_1980_county'
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Contents
    - Data Summary
    - Data Dictionary
    - Citation and Use
 
Additional documentation on NHGIS data sources is available at: 
    https://www.nhgis.org/documentation/tabular-data 
 
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Data Summary
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Year:             1980
Geographic level: County (by State)
Dataset:          1980 Census: STF 3 - Sample-Based Data
   NHGIS code:    1980_STF3
   NHGIS ID:      ds107
Breakdown(s):     Geographic Subarea:
                     Total area (0000)
 
Tables:
 
1. Years of School Completed
   Universe:    Persons 25 Years and Over
   Source code: NT48A
   NHGIS code:  DHM
 
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Data Dictionary
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Context Fields 
        GISJOIN:     GIS Join Match Code
        YEAR:        Data File Year
        REGIONA:     Region Code
        DIVISIONA:   Division Code
        STATE:       State Name
        STATEA:      State Code
        SMSAA:       Standard Metropolitan Statistical Area Code
        COUNTY:      County Name
        COUNTYA:     County Code
        CTY_SUBA:    County Subdivision Code
        PLACEA:      Place Code
        TRACTA:      Census Tract Code
        BLCK_GRPA:   Block Group Code
        ENUMDISTA:   Enumeration District Code
        SCSAA:       Standard Consolidated Statistical Area Code
        URB_AREAA:   Urban Area Code
        CDA:         Congressional District Code
        AIANHHA:     American Indian Area/Alaska Native Area/Hawaiian Home Land Code
        MCDSEQNOA:   MCD Sequence Number Code
        ZIPA:        5-Digit Zip Code Code
        AREANAME:    Area Name
 
Breakdown:
    Geographic Subarea: Total area (0000)
 
    Table 1:     Years of School Completed
    Universe:    Persons 25 Years and Over
    Source code: NT48A
    NHGIS code:  DHM
        DHM001:      Elementary (0-8 years)
        DHM002:      High school: 1-3 years
        DHM003:      High school: 4 years
        DHM004:      College: 1-3 years
        DHM005:      College: 4 or more years
 
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Citation and Use of NHGIS Data
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All persons are granted a limited license to use this documentation and the
accompanying data, subject to the following conditions:

* REDISTRIBUTION: You will not redistribute the data without permission.

  You may publish a subset of the data to meet journal requirements for accessing 
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* CITATION: You will cite NHGIS appropriately.

    * Publications and research reports employing NHGIS data (either tabular or GIS) 
      should include the following citation:

        Steven Manson, Jonathan Schroeder, David Van Riper, Tracy Kugler, and Steven Ruggles. 
        IPUMS National Historical Geographic Information System: Version 15.0 
        [dataset]. Minneapolis, MN: IPUMS. 2020. 
        http://doi.org/10.18128/D050.V15.0

    * Publications and research reports employing school attendance areas data 
      (either tabular or GIS) must cite it appropriately. The citation should 
      include the following:

        The College of William and Mary and the Minnesota Population Center.
        School Attendance Boundary Information System (SABINS): Version 1.0.
        Minneapolis, MN: University of Minnesota 2011.

    * For policy briefs, online resources, or articles in the popular press, we 
      recommend that you cite the use of NHGIS data as follows:

        IPUMS NHGIS, University of Minnesota, www.nhgis.org.

    * If possible, citations involving school attendance areas should also include
      the URL for the SABINS site:

        http://www.sabinsdata.org/.

These terms of use are a legally binding agreement. You can use the data only in 
accordance with these terms, and any other use is a violation of the agreement. 
Violations may result in revocation of the agreement and prohibition from using other 
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Send electronic material to: nhgis@umn.edu

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    IPUMS NHGIS
    Institute for Social Research and Data Innovation
    University of Minnesota
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